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436  Linux Stuff / General Linux questions / Re: Memory usage tip on: July 25, 2009, 05:07:01 PM
If You get nervous seeing plug's mem too extensively used try this:

sync
echo 3 > /proc/sys/vm/drop_caches
You may need to do this twice (from experience on x86_64 systems).    Also - it doesn't really "free" much memory. It can free up some slabinfo tablespace , but most of what it releases is only in use because nothing else needs it.  So if the memory usage in top frightens you, just remember that most of the space in "buffers" is free-to-be-used-when-needed anyway.
437  General Category / Application ideas and development Q/A / Re: Has Anyone Built A Live CD for Development? on: July 24, 2009, 10:14:53 AM
I'm having trouble with the file. I ran an md5sum on it and got:
f5cf081d4361ea32230449226efebec6  ubuntu-8.04.2-desktop-i386-sheevaplug.iso
Hmmmm....I get:
3121280126852919f4372aab24e754ba  ubuntu-8.04.2-desktop-i386-sheevaplug.iso
-rw-r--r-- 1 me... mine.. 735832064 Jul 21 22:12 ubuntu-8.04.2-desktop-i386-sheevaplug.iso

Quote
When I check the actual iso, I find that three files don't match the internal checksums. Two of them are manifest files and should not matter.
Indeed, but if you diff them on the CD you'll find that they do not differ, so why would they have diifferent md5sums (which md5sum.txt claims)?
Quote
The third is ./casper/filesystem.squashfs. I'm sure that does matter.
Given that the other files in casper/ are wrongly listed in md5sum.txt, I'd assume that it is the list which is wrong.

Quote
I was unable to burn a cdrom of the iso file. I suspect that it is just a hair too big. I burned it onto a USB key instead.
...
2 -- Has anyone actually successfully booted from this disk?
Sort of.  I'd actually burnt it to a DVD (I needed an iso image for a test and knew where this one was, so used it.  Just tried it for you and it certainly booted (I'm now looking at a heron on my laptop).
438  Hardware and U-Boot firmware / U-Boot stuff / Re: Trouble using ext2ls/ext2load on: July 24, 2009, 05:46:28 AM
2. For some reason, the ext2ls and ext2load commands are only capable of accessing the first partition on an SDcard.
I'm still waiting for my Plug to be sent, so can't test anything.
But - I can make a random guess at a possibility.
When you say "second partition", do you mean that, or do you mean "another partition".  Is this second partition really (e.g.) /dev/sda2, or is it /dev/sda5, which would be a logical partition?
439  General Category / Application ideas and development Q/A / Re: DisplayLink integration? on: July 22, 2009, 05:10:00 PM
That note has been in the Advansys drivers for several years now.  It must be buildable, since it exists in Mandriva2009.1, but unless you intend connecting an Advansys SCSI card (do you have a PCI bus??? - I have an Advansys SCSI card in the garage somewhere!!!) then don't bother building it.
Hmmmm...I now see you're building 2.6.30.1.  Mandriva2009.1 is 2.6.29.6(-ish).  It's possible that a recent change has finally broken the old DMA usage in advansys.c.  Anyway - I can't see you need it (nor any other SCSI driver).
440  General Category / General Discussion / Re: Abysmal network performance on: July 22, 2009, 01:09:43 PM
I have a brand new SheevaPlug running the default Ubuntu install (with root filesystem transferred to SDIO), plugged directly into a Netgear 802.11g router.
If it's plugged directly in why do you later mention "54Mbps LAN"?  That's a Wifi speed.  Are you referring to other clients?
Quote
Network transfers to the plug from any machine on the local network are really slow, usually less than 1 MB/s. Everything is slow- FTP, HTTP, Samba, etc. Other machines on the network appear to be going at normal 802.11g speeds. Anyone have any ideas?
..........
user@t60:~$  tracepath 192.168.0.8
  1:  t60.local            (192.168.232.135)  1.375ms pmtu 1500
  1:  192.168.232.2  (192.168.232.2)      0.280ms
  1:  192.168.232.2  (192.168.232.2)      0.252ms
  2:  192.168.0.8      (192.168.0.8 )         7.207ms reached
       Resume: pmtu 1500 hops 2 back 128

Where did that 192.168.232 network arrive from?  You haven't mentioned it anywhere!!
441  General Category / General Discussion / Re: Received yours yet? on: July 15, 2009, 12:34:52 PM
yet the account page tells me that it has shipped.
I didn't even realize there was an account page! Dark Blue on darkish grey doesn't show up well.
Mine is marked as not shipped yet.  Ordered 26 June.
442  Linux Stuff / Kernel / Re: Another newbie stuck with USB ethernet adapters... on: July 12, 2009, 04:08:53 PM
I took a look at three different models of ethernet adapters which I could lay my hands on at short notice, and here are the entries logged to syslog at boot:
Given that they'll be dynamically loaded modules the output from lsmod could be useful, as it will show which modules have been loaded.
443  Linux Stuff / General Linux questions / Re: Booting entirely off an external USB device on: July 06, 2009, 05:22:47 PM
But it seems to mount as sysfs:
  root@ubuntu:~# mount -t sysfs /dev/mtdblock1 /mnt/mtdroot
Probably not.  That has just mounted sysfs onto /mnt/mtdroot - it hasn't mounted /dev/mtdblock1, so you aren't seeing its contents.  sysfs is a way to export the kernel datastructures to userspace.  It just ignores the device option to the mount command.
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